The bars are parallel to the frame, but are they parallel to EACH OTHER?
Something has to explain the 1-link difference. A bent bar. A bent snap-up bracket. Different chains. One twisted chain. Chain U-bolted to the bar by the side of the link instead of the end. Something.
Get out the tape measure. Measure distance from each bar to the ground unhitched. Measure the distance from the bar to the hook on the snap-up bracket when hitched.
Travel trailers don't always have their weight spread out evenly side-to-side. Kitchen on one side makes that side heavy, for example. Slide on one side makes that side heavy.
